Wayne Rooney has not travelled with the Manchester United squad for their Europa League round-of-32 first leg against Midtjylland but youngsters Regan Poole and Joe Riley have been called up by Louis van Gaal.

Defenders Poole, 17, and Riley, 19, both started for the Under-21s against Reading on Monday night and were on the flight to Herning on Wednesday morning.

Rooney, who has scored seven goals in nine games this year, was absent as squad members checked in at Manchester Airport.

Watch: United players travel to Midtjylland

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United were last demoted to the Europa League in 2011-12, when they faced Ajax in the last 32 before they were comprehensively beaten by Athletic Bilbao in the next round.